<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			div{
				border-style:solid;
			}
			.lxt{
				width:200px;
			    height:100px;
				border:2px solid yellow;
			}
			div:nth-of-type(1){
				border-bottom-color:purple 
			}
		</style>
	</head>
	<body>
		<div class="lxt">
			<div>1</div>
			<div>2</div>
			<div>3</div>
		</div>
	</body>
</html>
